US7920654B2 - Signal processing method and apparatus using bit confidence values - Google Patents
Signal processing method and apparatus using bit confidence values Download PDFInfo
- Publication number
- US7920654B2 US7920654B2 US10/539,355 US53935505A US7920654B2 US 7920654 B2 US7920654 B2 US 7920654B2 US 53935505 A US53935505 A US 53935505A US 7920654 B2 US7920654 B2 US 7920654B2
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- Prior art keywords
- bits
- bit
- mapping
- symbols
- value
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0045—Arrangements at the receiver end
- H04L1/0047—Decoding adapted to other signal detection operation
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/06—Dc level restoring means; Bias distortion correction ; Decision circuits providing symbol by symbol detection
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/06—Dc level restoring means; Bias distortion correction ; Decision circuits providing symbol by symbol detection
- H04L25/067—Dc level restoring means; Bias distortion correction ; Decision circuits providing symbol by symbol detection providing soft decisions, i.e. decisions together with an estimate of reliability
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/18—Phase-modulated carrier systems, i.e. using phase-shift keying
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/18—Phase-modulated carrier systems, i.e. using phase-shift keying
- H04L27/22—Demodulator circuits; Receiver circuits
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0045—Arrangements at the receiver end
- H04L1/0054—Maximum-likelihood or sequential decoding, e.g. Viterbi, Fano, ZJ algorithms
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0056—Systems characterized by the type of code used
- H04L1/0067—Rate matching
- H04L1/0068—Rate matching by puncturing
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0056—Systems characterized by the type of code used
- H04L1/0071—Use of interleaving
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/20—Arrangements for detecting or preventing errors in the information received using signal quality detector
- H04L1/203—Details of error rate determination, e.g. BER, FER or WER
Abstract
Description
-
- assigning a confidence value comprises mapping symbols to binary bits by means of a Gray code;
- incorporating data on the mapping determination in a look-up table for reference;
- re-coding hard decisions as an (I,Q) pair and taking soft decisions therefrom;
- demodulation by decision feedback equalisation with whitening matched filtering;
- using a digital processor for equalisation;
- using dedicated signal processing hardware for equalisation;
- de-interleaving, de-puncturing and incremental redundancy steps before convolutional decoding.
TABLE 1 | |||||
8- | Bit | 0 | |
|
|
0 | 1 | 1 | 1 | ||
1 | 0 | 1 | 1 | ||
2 | 0 | 1 | 0 | ||
3 | 0 | 0 | 0 | ||
4 | 0 | 0 | 1 | ||
5 | 1 | 0 | 1 | ||
6 | 1 | 0 | 0 | ||
7 | 1 | 1 | 0 | ||
TABLE 2 | |||||
8- | Bit | 0 | |
|
|
0 | 1 | |
1 | |
1 | −1 | |
1 | |
2 | − |
1 | −1 | |
3 | −α | −1 | −1 | |
4 | −1 | − |
1 | |
5 | 1 | − |
1 | |
6 | α | −1 | −1 | |
7 | |
1 | −1 | |
TABLE 3 | |||
C/I ratio of interest | Optimum value | Benefit | |
Coding Scheme | (dB) | for α | (dB) |
ECSD 28.8 NT | 13-15 | 1.7 | 0.5 |
EGPRS MCS-5 | 13-15 | 1.9 | 1.0 |
ECSD 28.8 T | 15-17 | 1.7 | 0.5 |
EGPRS MCS-6 | 15-17 | 1.7 | 1.0 |
ECSD 32 T | 16-18 | 1.7 | 0.4 |
ECSD 43.2 NT | 18-20 | 1.7 | 0.5 |
EGPRS MCS-7 | 21-23 | No optimum value | 0.4 |
EGPRS MCS-8 | 21-23 | No optimum value | 0.1 |
EGPRS MCS-9 | 23-25 | No optimum value | negligible |
Claims (25)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GBGB0229320.7A GB0229320D0 (en) | 2002-12-17 | 2002-12-17 | Signal processing method and apparatus |
GB0229320.7 | 2002-12-17 | ||
PCT/IB2003/005658 WO2004056058A2 (en) | 2002-12-17 | 2003-12-03 | Signal processing method and apparatus using bit confidence values |
Publications (2)
Publication Number | Publication Date |
---|---|
US20060193403A1 US20060193403A1 (en) | 2006-08-31 |
US7920654B2 true US7920654B2 (en) | 2011-04-05 |
Family
ID=9949788
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/539,355 Active 2025-09-26 US7920654B2 (en) | 2002-12-17 | 2003-12-03 | Signal processing method and apparatus using bit confidence values |
Country Status (10)
Country | Link |
---|---|
US (1) | US7920654B2 (en) |
EP (1) | EP1576778B1 (en) |
JP (1) | JP4495596B2 (en) |
KR (1) | KR100993461B1 (en) |
CN (1) | CN1726684B (en) |
AT (1) | ATE356502T1 (en) |
AU (1) | AU2003302948A1 (en) |
DE (1) | DE60312382T2 (en) |
GB (1) | GB0229320D0 (en) |
WO (1) | WO2004056058A2 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7515652B2 (en) * | 2003-09-30 | 2009-04-07 | Broadcom Corporation | Digital modulator for a GSM/GPRS/EDGE wireless polar RF transmitter |
US8126085B2 (en) * | 2004-11-22 | 2012-02-28 | Intel Corporation | Method and apparatus to estimate channel tap |
WO2017122925A2 (en) * | 2016-01-12 | 2017-07-20 | 국민대학교 산학협력단 | Dsm-psk optical wireless transmission method and device |
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-
2002
- 2002-12-17 GB GBGB0229320.7A patent/GB0229320D0/en not_active Ceased
-
2003
- 2003-12-03 WO PCT/IB2003/005658 patent/WO2004056058A2/en active IP Right Grant
- 2003-12-03 KR KR1020057011081A patent/KR100993461B1/en active IP Right Grant
- 2003-12-03 DE DE60312382T patent/DE60312382T2/en not_active Expired - Lifetime
- 2003-12-03 AT AT03813226T patent/ATE356502T1/en not_active IP Right Cessation
- 2003-12-03 CN CN2003801063506A patent/CN1726684B/en not_active Expired - Lifetime
- 2003-12-03 US US10/539,355 patent/US7920654B2/en active Active
- 2003-12-03 AU AU2003302948A patent/AU2003302948A1/en not_active Abandoned
- 2003-12-03 JP JP2004560033A patent/JP4495596B2/en not_active Expired - Fee Related
- 2003-12-03 EP EP03813226A patent/EP1576778B1/en not_active Expired - Lifetime
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Also Published As
Publication number | Publication date |
---|---|
WO2004056058A3 (en) | 2004-08-05 |
AU2003302948A8 (en) | 2004-07-09 |
CN1726684A (en) | 2006-01-25 |
DE60312382T2 (en) | 2007-12-06 |
KR100993461B1 (en) | 2010-11-09 |
AU2003302948A1 (en) | 2004-07-09 |
KR20050089829A (en) | 2005-09-08 |
CN1726684B (en) | 2012-08-15 |
JP4495596B2 (en) | 2010-07-07 |
DE60312382D1 (en) | 2007-04-19 |
WO2004056058A2 (en) | 2004-07-01 |
EP1576778B1 (en) | 2007-03-07 |
EP1576778A2 (en) | 2005-09-21 |
JP2006510295A (en) | 2006-03-23 |
ATE356502T1 (en) | 2007-03-15 |
US20060193403A1 (en) | 2006-08-31 |
GB0229320D0 (en) | 2003-01-22 |
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